I thought it was on here somewhere already but couldn't find it, so here it is. I learned this version from a Lizzie Higgins recording. I hope it's what you are looking for.

I once was a ploughboy but a soldier am now
I hae coorted wi' Lovely Molly as I followed the plough
I hae coorted wi' Lovely Molly frae the age o' sixteen
But now I must leave her and serve James my King

O Molly, Lovely Molly, despite all your charms
There is mony's the night you hae laid in my arms
And if ever I return again it will be in the Spring
Where the mavis and the turtle dove and the nightingales sing

You may go to the mercat, you may go to the fair
You may go to kirk on Sunday and meet your new love there
But if anybody loves you half as much as I do
Then I won't stop your marriage. Farewell love, adieu.

O Molly, Lovely Molly, despite all your charms
There is mony's the night you hae laid in my arms
And if ever I return again it will be in the Spring
Where the mavis and the turtle dove and the nightingales sing